NR 664.0193(5)(a)4.4. Designed and installed to surround the tank completely and to cover all surrounding earth likely to come into contact with the waste if the waste is released from the tank (i.e., capable of preventing lateral as well as vertical migration of the waste). NR 664.0193(5)(a)5.5. Provided with an impermeable interior coating or lining that is compatible with the stored waste and that will prevent migration of waste into the concrete. NR 664.0193(5)(b)1.1. Designed or operated to contain 100% of the capacity of the largest tank within its boundary. NR 664.0193(5)(b)2.2. Designed or operated to prevent run-on or infiltration of precipitation into the secondary containment system unless the collection system has sufficient excess capacity to contain run-on or infiltration. The additional capacity shall be sufficient to contain precipitation from a 25-year, 24-hour rainfall event. NR 664.0193(5)(b)3.3. Constructed with chemical-resistant water stops in place at all joints (if any). NR 664.0193(5)(b)4.4. Provided with an impermeable interior coating or lining that is compatible with the stored waste and that will prevent migration of waste into the concrete. NR 664.0193(5)(b)5.5. Provided with a means to protect against the formation of and ignition of vapors within the vault, if the waste being stored or treated meets any of the following: NR 664.0193(5)(b)6.6. Provided with an exterior moisture barrier or be otherwise designed or operated to prevent migration of moisture into the vault if the vault is subject to hydraulic pressure. NR 664.0193(5)(c)1.1. Designed as an integral structure (i.e., an inner tank completely enveloped within an outer shell) so that the outer shell contains any release from the inner tank. NR 664.0193(5)(c)2.2. Protected, if constructed of metal, from both corrosion of the primary tank interior and of the external surface of the outer shell. NR 664.0193(5)(c)3.3. Provided with a built-in continuous leak detection system capable of detecting a release within 24 hours, or at the earliest practicable time, if the owner or operator can demonstrate to the department, and the department concludes, that the existing detection technology or site conditions would not allow detection of a release within 24 hours. NR 664.0193 NoteNote: The provisions outlined in the Steel Tank Institute’s (STI) “Standard for Dual Wall Underground Steel Storage Tanks” may be used as guidelines for aspects of the design of underground steel double-walled tanks.
NR 664.0193(6)(6) Ancillary equipment shall be provided with secondary containment (e.g., trench, jacketing, double-walled piping) that meets the requirements of subs. (2) and (3) except for all of the following: NR 664.0193(6)(a)(a) Aboveground piping that is visually inspected for leaks on a daily basis, except for flanges, joints, valves and other connections, which must have secondary containment unless they are identified in and comply with pars. (b) to (d). NR 664.0193(6)(b)(b) Welded flanges, welded joints and welded connections, that are visually inspected for leaks on a daily basis. NR 664.0193(6)(c)(c) Sealless or magnetic coupling pumps and sealless valves, that are visually inspected for leaks on a daily basis. NR 664.0193(6)(d)(d) Pressurized aboveground piping systems with automatic shut-off devices (e.g., excess flow check valves, flow metering shutdown devices, loss of pressure actuated shut-off devices) that are visually inspected for leaks on a daily basis. NR 664.0193(7)(7) The owner or operator may obtain a variance from the requirements of this section if the department finds, as a result of a demonstration by the owner or operator that alternative design and operating practices, together with location characteristics, will prevent the migration of any hazardous waste or hazardous constituents into the groundwater or surface water at least as effectively as secondary containment during the active life of the tank system; or, that in the event of a release that does migrate to groundwater or surface water, no substantial present or potential hazard will be posed to human health or the environment. New underground tank systems may not, per a demonstration in accordance with par. (b), be exempted from the secondary containment requirements of this section. NR 664.0193(7)(a)(a) In deciding whether to grant a variance based on a demonstration of equivalent protection of groundwater and surface water, the department will consider all of the following: NR 664.0193(7)(a)3.3. The hydrogeologic setting of the facility, including the thickness of soils present between the tank system and groundwater. NR 664.0193(7)(a)4.4. All other factors that would influence the quality and mobility of the hazardous constituents and the potential for them to migrate to groundwater or surface water. NR 664.0193(7)(b)(b) In deciding whether to grant a variance based on a demonstration of no substantial present or potential hazard, the department will consider all of the following: NR 664.0193(7)(b)1.1. The potential adverse effects on groundwater, surface water and land quality taking into account all of the following: NR 664.0193(7)(b)1.a.a. The physical and chemical characteristics of the waste in the tank system, including its potential for migration. NR 664.0193(7)(b)1.d.d. The potential for damage to wildlife, crops, vegetation and physical structures caused by exposure to waste constituents. NR 664.0193(7)(b)2.2. The potential adverse effects of a release on groundwater quality, taking into account all of the following: NR 664.0193(7)(b)2.d.d. The existing quality of groundwater, including other sources of contamination and their cumulative impact on the groundwater quality. NR 664.0193(7)(b)3.3. The potential adverse effects of a release on surface water quality, taking into account all of the following: NR 664.0193(7)(b)3.d.d. The current and future uses of surface waters in the area and any water quality standards established for those surface waters. NR 664.0193(7)(b)3.e.e. The existing quality of surface water, including other sources of contamination and the cumulative impact on surface-water quality. NR 664.0193(7)(b)4.4. The potential adverse effects of a release on the land surrounding the tank system, taking into account all of the following: NR 664.0193(7)(c)(c) The owner or operator of a tank system, for which a variance from secondary containment had been granted in accordance with the requirements of par. (a), at which a release of hazardous waste has occurred from the primary tank system but has not migrated beyond the zone of engineering control (as established in the variance), shall do all of the following: NR 664.0193(7)(c)2.2. Decontaminate or remove contaminated soil to the extent necessary to do all of the following: NR 664.0193(7)(c)2.a.a. Enable the tank system for which the variance was granted to resume operation with the capability for the detection of releases at least equivalent to the capability it had prior to the release. NR 664.0193(7)(c)2.b.b. Prevent the migration of hazardous waste or hazardous constituents to groundwater or surface water. NR 664.0193(7)(d)(d) The owner or operator of a tank system, for which a variance from secondary containment had been granted in accordance with the requirements of par. (a), at which a release of hazardous waste has occurred from the primary tank system and has migrated beyond the zone of engineering control (as established in the variance), shall do all of the following: NR 664.0193(7)(d)2.2. Prevent the migration of hazardous waste or hazardous constituents to groundwater or surface water, if possible, and decontaminate or remove contaminated soil. If contaminated soil cannot be decontaminated or removed or if groundwater has been contaminated, the owner or operator shall comply with the requirements of s. NR 664.0197 (2). NR 664.0193(7)(d)3.3. If repairing, replacing or reinstalling the tank system, provide secondary containment in accordance with the requirements of subs. (1) to (6) or reapply for a variance from secondary containment and meet the requirements for new tank systems in s. NR 664.0192 if the tank system is replaced. The owner or operator shall comply with these requirements even if contaminated soil can be decontaminated or removed and groundwater or surface water has not been contaminated. NR 664.0193(8)(8) All of the following procedures shall be followed in order to request a variance from secondary containment: NR 664.0193(8)(a)(a) The department shall be notified in writing by the owner or operator that the owner or operator intends to conduct and submit a demonstration for a variance from secondary containment as allowed in sub. (7) according to the following schedule: NR 664.0193(8)(a)1.1. For existing tank systems, at least 24 months prior to the date that secondary containment must be provided in accordance with sub. (1). NR 664.0193(8)(a)2.2. For new tank systems, at least 30 days prior to entering into a contract for installation. NR 664.0193(8)(b)(b) As part of the notification, the owner or operator shall also submit to the department a description of the steps necessary to conduct the demonstration and a timetable for completing each of the steps. The demonstration shall address each of the factors listed in sub. (7) (a) or (b). NR 664.0193(8)(c)(c) The demonstration for a variance shall be completed within 180 days after notifying the department of an intent to conduct the demonstration. NR 664.0193(8)(d)(d) If a variance is granted under this subsection, the department will require the licensee to construct and operate the tank system in the manner that was demonstrated to meet the requirements for the variance. NR 664.0193(9)(9) All tank systems, until the time that secondary containment that meets the requirements of this section is provided, shall comply with the following: NR 664.0193(9)(a)(a) For non-enterable underground tanks, a leak test that meets the requirements of s. NR 664.0191 (2) (e) or other tank integrity method, as approved or required by the department, shall be conducted at least annually. NR 664.0193(9)(b)(b) For other than non-enterable underground tanks, the owner or operator shall either conduct a leak test as in par. (a) or develop a schedule and procedure for an assessment of the overall condition of the tank system by a qualified professional engineer. The schedule and procedure shall be adequate to detect obvious cracks, leaks and corrosion or erosion that may lead to cracks and leaks. The owner or operator shall remove the stored waste from the tank, if necessary, to allow the condition of all internal tank surfaces to be assessed. The frequency of these assessments shall be based on the material of construction of the tank and its ancillary equipment, the age of the system, the type of corrosion or erosion protection used, the rate of corrosion or erosion observed during the previous inspection and the characteristics of the waste being stored or treated. NR 664.0193(9)(c)(c) For ancillary equipment, a leak test or other integrity assessment as approved by the department shall be conducted at least annually. NR 664.0193 NoteNote: The practices described in the American Petroleum Institute (API) Publication Guide for Inspection of Refinery Equipment, Chapter XIII, “Atmospheric and Low-Pressure Storage Tanks”, 4th edition, 1981, may be used, where applicable, as guidelines for assessing the overall condition of the tank system.
NR 664.0193(9)(d)(d) The owner or operator shall maintain on file at the facility a record of the results of the assessments conducted in accordance with pars. (a) to (c). NR 664.0193(9)(e)(e) If a tank system or component is found to be leaking or unfit for use as a result of the leak test or assessment in pars. (a) to (c), the owner or operator shall comply with the requirements of s. NR 664.0196. NR 664.0193 HistoryHistory: CR 05-032: cr. Register July 2006 No. 607, eff. 8-1-06; CR 16-007: r. and recr. (1), am. (9) (b) Register July 2017 No. 739, eff. 8-1-17; CR 19-082: cr. (5) (a) 5., am. (5) (b) 5. a., b., (6) (a) Register August 2020 No 776, eff. 9-1-20. NR 664.0194(1)(1) Hazardous wastes or treatment reagents may not be placed in a tank system if they could cause the tank, its ancillary equipment or the containment system to rupture, leak, corrode or otherwise fail. NR 664.0194(2)(2) The owner or operator shall use appropriate controls and practices to prevent spills and overflows from tank or containment systems. These include at a minimum all of the following: NR 664.0194(2)(a)(a) Spill prevention controls (e.g., check valves, dry disconnect couplings). NR 664.0194(2)(b)(b) Overfill prevention controls (e.g., level sensing devices, high level alarms, automatic feed cutoff or bypass to a standby tank). NR 664.0194(2)(c)(c) Maintenance of sufficient freeboard in uncovered tanks to prevent overtopping by wave or wind action or by precipitation. NR 664.0194(3)(3) The owner or operator shall comply with the requirements of s. NR 664.0196 if a leak or spill occurs in the tank system. NR 664.0194 HistoryHistory: CR 05-032: cr. Register July 2006 No. 607, eff. 8-1-06. NR 664.0195(1)(1) The owner or operator shall develop and follow a schedule and procedure for inspecting overfill controls. NR 664.0195(2)(2) The owner or operator shall inspect at least once each operating day data gathered from monitoring and leak detection equipment (for example, pressure or temperature gauges, monitoring wells) to ensure that the tank system is being operated according to its design. NR 664.0195 NoteNote: Section NR 664.0015 (3) requires the owner or operator to remedy any deterioration or malfunction found. Section NR 664.0196 requires the owner or operator to notify the department within 24 hours of confirming a leak. Also, if a hazardous substance is released to the environment, 40 CFR part 302 may require the owner or operator to notify the national response center and s. 292.11, Stats., and ch. NR 706 may require the owner or operator to notify the department. NR 664.0195(3)(3) In addition, except as noted under sub. (4), the owner or operator shall inspect at least once each operating day: NR 664.0195(3)(a)(a) Above ground portions of the tank system, if any, to detect corrosion or releases of waste. NR 664.0195(3)(b)(b) The construction materials and the area immediately surrounding the externally accessible portion of the tank system, including the secondary containment system (for example, dikes) to detect erosion or signs of releases of hazardous waste (for example, wet spots, dead vegetation).
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Chs. NR 600-699; Environmental Protection – Hazardous Waste Management
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